Process for Dehairing and Liming of Hides, Skins or Pelts
OwnerAndreas Gerardus Josephus Maria van der Haminventor
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Abstract
The present invention relates to a novel process for substantially lime free dehairing and liming of skins/hides/pelts using metal silicate and an alkaline to obtain dehaired skins/hides/pelts of good quality and less polluted effluent from the dehairing process.
Claims30
A process for dehairing and/or liming of hides, skins or pelts comprising:
- treating the hides, skins or pelts with a metal silicate and an alkaline in an aqueous composition in the substantial absence of calcium hydroxide wherein the amount of calcium hydroxide in the aqueous composition is less than about 0.2 weight %.
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A dehairing and/or liming composition comprising a metal silicate and an alkaline and substantially free of calcium hydroxide wherein the ratio of metal silicate and alkaline is in the range of about 90/10 to about 75/25 where the ratio is based on weight of both solid materials and where the major component is the metal silicate.
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Dependencies are inferred from the claim text.